ok mcbride@ henning@ deraadt@ todd@

Allows multiple hosts to share an IP address, providing high availability
and load balancing.
Based on code by mickey@, with additional help from markus@
and Marco_Pfatschbacher@genua.de
ok deraadt@

ok henning@ millert@

3rd party, chroot-unaware modules are loaded, if not sooner
ok millert@

from Otto and myself;
fixes PR 3392;
ok deraadt@

it is not used by base and the only port using it, uses another owner/group
ok henning@, deraadt@

fingerprints, please go to http://lcamtuf.coredump.cx/p0f-help/ with any
and all Win95 boxes.  thanks!

are in the 21st century now, you know.

ok deraadt@ henning@ frantzen@

ok frantzen@

http://lcamtuf.coredump.cx/p0f-help/ to help add and refine fingerprints

frantzen@ ok

otherwise preserve `hostname`
netbooted machines can live perfectly fine without it; they get their hostname
earlier.
ok krw@ cedric@

problems noted by fgsch@ and deraadt@